Rivet nut



FIG. 1 is an environmental, top perspective view of a rivet nut shown secured to sheet material;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side elevational view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines in the drawing disclosure, showing of the sheet metal, illustrates the environment of the claimed design and forms no part thereof. 

CLAIM The ornamental design for a rivet nut, as shown and described. 